RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star GA1100:02332352 with event index number of 2116191

Geocentric closest approach at 2025/11/15 05:53:29 UTC

J2000 position of star is 06:41:18.0 +21:16:14
Equinox of date position of star is 06:42:44.9 +21:14:45
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 78 degrees from the moon. Moon is 21% illuminated.
Apparent brightness V=20.7

[RECON map]
Object is 38.9 AU from the Sun and 38.2 AU from the Earth.
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 463 seconds.
The 1-sigma cross-track error in the shadow position is 1773 km.
The sky-plane scale is 27690.0 km/arcsec.

The object has an absolute magnitude Hv=4.7
Diameter=691.9 km assuming a 5% albedo -- 44.5 sec chord
Diameter=282.4 km assuming a 30% albedo -- 18.2 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 119979, (2025/11/15 05:53UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:53.9 +27:57:42  1.1 16.01  65
Alhena         06:39:12.4 +16:22:30  1.9  4.94  79
PPM 096308     06:40:38.6 +22:00:21  6.0  0.92  79
PPM 096360     06:42:15.2 +20:54:49  8.4  0.36  79
PPM 096388     06:43:20.8 +21:09:37  9.0  0.14  78
PPM 096381     06:43:06.7 +21:21:12 11.0  0.13  78
119979         06:42:50.8 +21:14:39 14.5        78
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 1.9 sigma about the mid-time.
The median site spacing is 24.8 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:58:06 -51.4 Dark Down 24.7 86.0 Low 05:43:06 - 06:13:06 9743
Kelowna 05:58:07 -52.4 Dark Down 25.2 86.3 Low 05:43:07 - 06:13:07 9657
Peachland 05:58:09 -52.3 Dark Down 25.0 86.1 Low 05:43:09 - 06:13:09 9655
Victoria 05:58:19 -51.5 Dark Down 22.5 82.9 Low 05:43:19 - 06:13:19 9644
Summerland 05:58:08 -52.5 Dark Down 25.1 86.1 Low 05:43:08 - 06:13:08 9640
Penticton 05:58:09 -52.6 Dark Down 25.1 86.1 Low 05:43:09 - 06:13:09 9632
Oliver 05:58:12 -52.8 Dark Down 25.1 86.0 Low 05:43:12 - 06:13:12 9603
Anarchist Mountain Observatory 05:58:12 -53.1 Dark Down 25.2 86.0 Low 05:43:12 - 06:13:12 9585
Sleaford 05:57:34 -55.0 Dark Down 33.5 98.2 Up 05:42:34 - 06:12:34 9550
Okanogan 05:58:15 -53.4 Dark Down 25.0 85.6 Low 05:43:15 - 06:13:15 9537
Brewster 05:58:16 -53.5 Dark Down 24.9 85.3 Low 05:43:16 - 06:13:16 9519
Manson/Chelan 05:58:18 -53.5 Dark Down 24.6 85.0 Low 05:43:18 - 06:13:18 9511
Wenatchee 05:58:20 -53.8 Dark Down 24.5 84.6 Low 05:43:20 - 06:13:20 9476
Ellensburg 05:58:22 -53.9 Dark Down 24.3 84.3 Low 05:43:22 - 06:13:22 9447
Yakima 05:58:25 -54.2 Dark Down 24.3 84.1 Low 05:43:25 - 06:13:25 9413
Toppenish/White Swan 05:58:26 -54.4 Dark Down 24.4 84.1 Low 05:43:26 - 06:13:26 9390
The Dalles 05:58:30 -54.5 Dark Down 23.7 83.3 Low 05:43:30 - 06:13:30 9344
PNWRO 05:58:24 -55.4 Dark Down 25.3 85.0 Low 05:43:24 - 06:13:24 9321
Maupin 05:58:32 -54.9 Dark Down 23.8 83.1 Low 05:43:32 - 06:13:32 9306
Sisters 05:58:35 -55.2 Dark Down 23.3 82.4 Low 05:43:35 - 06:13:35 9244
Bend 05:58:37 -55.5 Dark Down 23.5 82.5 Low 05:43:37 - 06:13:37 9216
Oregon Observatory 05:58:38 -55.5 Dark Down 23.4 82.4 Low 05:43:38 - 06:13:38 9205
Chiloquin 05:58:44 -56.1 Dark Down 22.9 81.6 Low 05:43:44 - 06:13:44 9101
Klamath Falls 05:58:45 -56.3 Dark Down 22.9 81.5 Low 05:43:45 - 06:13:45 9069
Cedarville 05:58:45 -57.7 Dark Down 24.0 82.2 Low 05:43:45 - 06:13:45 8962
Fall River/Burney 05:58:49 -57.3 Dark Down 23.0 81.2 Low 05:43:49 - 06:13:49 8953
Greenville 05:58:53 -58.1 Dark Down 23.2 81.1 Low 05:43:53 - 06:13:53 8859
Gimple 05:58:53 -58.1 Dark Down 23.3 81.2 Low 05:43:53 - 06:13:53 8856
Quincy 05:58:54 -58.2 Dark Down 23.2 81.0 Low 05:43:54 - 06:13:54 8840
Portola 05:58:54 -58.6 Dark Down 23.5 81.3 Low 05:43:54 - 06:13:54 8815
Reno 05:58:52 -59.1 Dark Down 24.0 81.5 Low 05:43:52 - 06:13:52 8772
Carson City 05:58:54 -59.3 Dark Down 24.0 81.4 Low 05:43:54 - 06:13:54 8739
Gardnerville 05:58:56 -59.5 Dark Down 24.0 81.3 Low 05:43:56 - 06:13:56 8715
Yerington 05:58:55 -59.9 Dark Down 24.4 81.7 Low 05:43:55 - 06:13:55 8703
Hawthorne 05:58:55 -60.5 Dark Down 24.8 81.8 Low 05:43:55 - 06:13:55 8645
Lee Vining 05:58:59 -60.5 Dark Down 24.3 81.2 Low 05:43:59 - 06:13:59 8606
Bishop 05:59:00 -61.3 Dark Down 24.8 81.4 Low 05:44:00 - 06:14:00 8529
Dunrhomin 05:58:20 -66.1 Dark Down 35.1 90.8 Up 05:43:20 - 06:13:20 8457
Nikitin 05:58:19 -66.2 Dark Down 35.1 90.7 Up 05:43:19 - 06:13:19 8440
Beatty 05:58:58 -62.6 Dark Down 26.0 82.1 Low 05:43:58 - 06:13:58 8438
CU-SBO 05:58:21 -66.3 Dark Down 35.1 90.6 Up 05:43:21 - 06:13:21 8436
Wildwood 05:59:11 -62.9 Dark Down 24.1 79.8 Low 05:44:11 - 06:14:11 8223
Patrick 05:58:57 -65.4 Dark Down 28.1 82.8 Low 05:43:57 - 06:13:57 8213
Laughlin/Bullhead City 05:59:00 -65.1 Dark Down 27.5 82.4 Low 05:44:00 - 06:14:00 8209
Lake Havasu City 05:59:02 -65.7 Dark Down 27.7 82.1 Low 05:44:02 - 06:14:02 8136
Idyllwild 05:59:08 -64.4 Dark Down 25.6 80.6 Low 05:44:08 - 06:14:08 8132
Calipatria 05:59:08 -65.6 Dark Down 26.5 80.9 Low 05:44:08 - 06:14:08 8037
George/Scottsdale 05:58:58 -67.7 Dark Down 29.6 83.0 Low 05:43:58 - 06:13:58 7990
Yuma 05:59:07 -66.5 Dark Down 27.2 81.1 Low 05:44:07 - 06:14:07 7968

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 119979, (2025/11/15 05:53UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 16.01  65
Alhena         06:37:42.8 +16:23:57  1.9  4.94  79
PPM 096308     06:39:05.3 +22:01:51  6.0  0.92  79
PPM 096360     06:40:42.6 +20:56:23  8.4  0.36  79
PPM 096388     06:41:48.0 +21:11:13  9.0  0.14  78
PPM 096381     06:41:33.9 +21:22:47 11.0  0.13  78
119979         06:41:18.0 +21:16:14 14.5        78
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:30:34 UT

Marc W. Buie, Southwest Research Institute

RECON